123200320 has 28 divisors (see below), whose sum is σ = 293371524. Its totient is φ = 49280000.

The previous prime is 123200299. The next prime is 123200327. The reversal of 123200320 is 23002321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65804544 + 57395776 = 8112^2 + 7576^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123200320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123200327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192181 + ... + 192820.

Almost surely, 2^123200320 is an apocalyptic number.

123200320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123200320 is an abundant number, since it is smaller than the sum of its proper divisors (170171204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123200320 is an equidigital number, since it uses as much as digits as its factorization.

123200320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385018 (or 385008 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 123200320 is about 11099.5639553993. The cubic root of 123200320 is about 497.5888177579.

Adding to 123200320 its reverse (23002321), we get a palindrome (146202641).

The spelling of 123200320 in words is "one hundred twenty-three million, two hundred thousand, three hundred twenty".